Quickly-detachable tool joint



A. FALCONER QUICKLY DETACHABLE TOOL JOINT Filed July 14. 1922 4 Patented Sept. `ze, i925.

Be it .known thatsl, AmfiN.fFALoom,wia

citizen of'athe `United States,` residing at Los nngeles, in the :county i` .of Los Angeles and :n State of California, 'have inventednewlfand `iusefiil Impnovenientsaini .QuicklyeDetaclra-ble specification no joints.

instrument is,y automatically locked iiirposi-` i 4tion byfftlie driving *shaftVl ywhen ythe ,i instrueao Y ment isapplied ato theftool basing or-gs'hell. a 2 i lAnother-objectfisito providefaninstrzument 1 having a lfiexible ishaft: Iandfto-l ,which einstrluf ment `there L is radaptedlto tbe: attached removable implement, @means being provided forr .automatically"disconnecting the driving shaft from the driven part of the implement when the flexible shaft is distorted to a predetermined degree.

Other objects will be made manifest in the following specification of an embodiment of the invention illustrated in `the accompanying drawings, in whichj Figure l is a side elevation and longitudinal section ot' the invention as combined in a portable `inanicuring tool, the flexible shaft being in a true straight line arrange-ment.

Fig. 2 is a side elevation and partial section showing the automaticdisconnection of the driving means `froma driven part of the tool uponl a given degree of `flexure of the flexible shaft. j Fig. Bis a longitudinal section of the coupling elements of the` device.

Ul i

l elevation showing `the means-for connecting the flexiblesliaft and its casing to a motor.v

The present invention is incorporated in a;

`ywllliis invention `relates todetachable `tool :'It is .an object .off `the*fr-present invention :to jf..

housing.

Fig. 4t is a longitudinal section and partial spindle 8 rotatively mounted in a barrel 4. One of the series `of implements when ap-k termost link tis' provided i with a i drivingrodi.`

"6, and jthisislprovided with ainoncircular driving part to becoupledftothe spindle 3 ofgtheiinplementto\bedriven. .c Thet.,rotatingV coupling,a's "herepshown, comprises a driving ,tonguetor lug 61 .on the lrendqofi-the,-rod @pand thislug is designed to enterandengageaa yoke or 'slotteclflieadj"" .ofl thel spindle1 3..V Thenspindle i isy `.prevented `@from `end@movenientinzitsbarrell; e @if 1A rfeaturfe vof fthe; unii'iventionf` consistsof fmeansforsubstantially automaticallyclutchj -ing =up1oi"a coupling lup the.; .drivinglrodja andthe `drivelicspindlel 43., l `fFor that-purpose the barrel l is provided witlizyathreadecn oc ett?" mounted witliingaifixed sleeve 1ol::bushing. 16a in which it is slidable@axiallyiY'Ilheftlexible' thus forming a flexible jacket. This may be, and preferably is, enclosedin a pliable cover or tube 9 of cloth or other suitable material. The motor -M is providedfwith a 'thin metal 85 hub` l0 which has'rolled orotherwise formed 1 threads 11, receiving the contiguous end of, the coiled jacket 8, thus providing a simple` and effective and inexpensive form of con-f nection between the jacket and the inotor` The opposite or free` end of 'the iiexible jacket Sis similarly threaded in a thimble 12 suitably secured upon the con# n l tiguous end of the socket 7 j ,Y Y j Since they jacket of coiled wire 8 is closely coiled, when the jacket is Vin a straight line f position as showninFigs. `1 andB, the ,coils lie snug against keach other, but ifthe jacket `is bowedit will be seen that the concave side of' the bowed jacket forms, along each coil, a 100 pivot about which the convex curved edge ofV the bowed jacket,.separatesv or `opens pivot@ all-y as vis shown in Fig.k 2. This Vprovides for thev automatic disconnectionfof 'thedriv-f ing rod 6 andthe driven spindle 31 as is`105 shown in Fig. 2, becausejof the relative increasing in the length vof the flexible tube or jacket 8 without complementary, increase inthe length offtheflexible'shaft which therefore produces a differential movement 110 of the socket as to the rod a 6, -the socket shifting yforwardly alongfthe'rod and Jcarrying the driven spindle 3 out of engagement withithedriving rod ,c .Y

cluding the spindlev 3 and itsibarrel4, the

threaded end of the barrel fis applied to the;

socket 7 and turned in just sufcient to engage the driving lug cland the clutch javvs f 3', whereupon because of the rotation ofthe the spindlein thebearing 'or barrel 4 causes 'the' latter to quickly rotate into 'its finalgpo- 'stionin the threaded end of thelsoeket 7. l It'iv'ill therefore be `fgsreen that the tools'or iimplements,- applicable' to* the device,can"be 'applied' 'and removed? Without stopping the ,Op'erati'onof the motor y l i" Itis desirable' that-the dri'ving rod 6 be disconnected from' the drivenmeinber Saft er the shaft and .t`scasinghas been distort-V y 'edbeyond ai suitable angle, so asto reduce `thefriction ofthe leigible'l shaft lin the dis- 'f'torted casingl and also topre'vntj chattering of the Wheel driving jine'mberf. yf'The distortion o't' theshaft 5 propergout of a f straight line as the housing bends, further yserves as means for -ielatively-shifting the driving rod G'inw'ardly lrointh-e attached :driving spindle. c t i .Y Y

, "Further embodiments;modifications and changes may lbe resorted' tol vvithin' the spirit yofthe inventionas herefclairned.

` What isclairned is: i Y 1i In 'aninstruinent h .j saidfdrivenrod. 1 -1 ,l 2f LIn ani instrument fshaft; andj a flexible jacket surroundingv saidv vingv a flexible v f V1,555,647VL y,

shaft yandfa `flexible jacket surreunding said,

shaft', a tool jointcomprisinga 'socket meinsocket member, at driving rod ,rotatdable' within said sleeve paridsebersecured to said jacket, a ixedsleeve Witli-y l i ci in Said ,"In the"applicatiiifbfatooliniplemfentlfin f i ableilvvithinfsaidgbarrel, means formed upon said drivenand driving rods to provide for interlockingengagement, saidA means being fso: formed and. so` arranged that vwhen "said flexible shaft-:and jacket `are materially bent,

said-driving rod Willwbe/caused to disengage sha-ft, a ltoolfjroint comprising a 'socketinem-y bei' `securedlto said jacke-tja fixedy sleeve Within said socket member, a driving rodro#v ltatableand slidable'within said. sleeve and Y secured v to saidi flexible shaft, saidisocket being internally threaded torece-ive anexternally threadedzbarreha 'driven rodl rotatable yvvithi'nfisaidfbarrel, a. `head :formed upon said diiving'ro'd, .a socket-'formed upon said drivenY rod,A 4rsaidhead andthe last ymentioned socket beine-lso :farran ed@ that kwhen said iexible shaft" and jaoketfare materially bent,

said.y driving rod @will 'bef caused to f slide axivallyivvithin-said sleevezcausingsaid yhead 'to disengagef the socket: upon y,said ldi'iven'y rod.

In ltestiinony Eivhereoy -I 4have y lsigned my namegrto this speciicat-ion.k

d italieONER,4 t L Ayingfinteriially,threaded to receive an exter- Vnally threaded barrel, a driven rod rotat- 

